It’s no secret that some people’s bathroom habits are less than sanitary—we’re getting the creepy-crawlies just thinking about the number of strangers with terrible aim or who leave WITHOUT washing their hands. Gross.

Researchers at Michigan State found that10 percent of peopledidn’t wash their hands and nearly 1 in 4 just rinsed with water. Read: no soap was used. And a somewhat surprising result is the length of time that people washed their hands (average of 6 seconds) versus CDC’s recommendation (20 seconds). Not shocking was the fact that men were twice as likely tonotwash their hands at all. (Oh, and just as amusing? The researchers hid in a restroom to collect data. Pardon us a brief LOL.)

Should you ever find yourself in a gray area when it comes to hand wash rules, just follow this flowchart: